[dpdk-dev][PATCH v2 2/3] net/cnxk: add devargs support to parse custom SA action

[<kirankumark@marvell.com>]

From: Kiran Kumar K <kirankumark@marvell.com>

Adding devargs support to parse custom sa action.
Devargs can be specified in the following way.
-a 0002:02:00.0,custom_sa_act=1

Signed-off-by: Kiran Kumar K <kirankumark@marvell.com>
---
 doc/guides/nics/cnxk.rst               | 20 ++++++++++++++++++++
 drivers/net/cnxk/cnxk_ethdev_devargs.c | 10 ++++++++--
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/doc/guides/nics/cnxk.rst b/doc/guides/nics/cnxk.rst
index 31c801fa04..e5087343ed 100644
--- a/doc/guides/nics/cnxk.rst
+++ b/doc/guides/nics/cnxk.rst
@@ -251,6 +251,26 @@ Runtime Config Options
    With the above configuration, application can enable inline IPsec processing
    for 128 outbound SAs.
 
+- ``Enable custom SA action`` (default ``0``)
+
+   Custom SA action can be enabled by specifying ``custom_sa_act`` ``devargs`` parameter.
+
+   For example::
+
+      -a 0002:02:00.0,custom_sa_act=1
+
+   With the above configuration, application can enable custom SA action. This
+   configuration allows the potential for a MCAM entry to match many SAs,
+   rather than only match a single SA.
+   For cnxk device sa_index will be calculated based on SPI value. So, it will
+   be 1 to 1 mapping. By enabling this devargs and setting a MCAM rule, will
+   allow application to configure the sa_index as part of session create. And
+   later original SPI value can be updated using session update.
+   For example, application can set sa_index as 0 using session create as SPI value
+   and later can update the original SPI value (for example 0x10000001) using
+   session update. And create a flow rule with security action and algorithm as
+   RTE_PMD_CNXK_SEC_ACTION_ALG0 and sa_hi as 0x1000 and sa_lo as 0x0001.
+
 - ``Outbound CPT LF queue size`` (default ``8200``)
 
    Size of Outbound CPT LF queue in number of descriptors can be specified by
diff --git a/drivers/net/cnxk/cnxk_ethdev_devargs.c b/drivers/net/cnxk/cnxk_ethdev_devargs.c
index 9b2beb6743..248582e1f6 100644
--- a/drivers/net/cnxk/cnxk_ethdev_devargs.c
+++ b/drivers/net/cnxk/cnxk_ethdev_devargs.c
@@ -245,6 +245,7 @@ parse_sdp_channel_mask(const char *key, const char *value, void *extra_args)
 #define CNXK_OUTB_NB_CRYPTO_QS	"outb_nb_crypto_qs"
 #define CNXK_SDP_CHANNEL_MASK	"sdp_channel_mask"
 #define CNXK_FLOW_PRE_L2_INFO	"flow_pre_l2_info"
+#define CNXK_CUSTOM_SA_ACT	"custom_sa_act"
 
 int
 cnxk_ethdev_parse_devargs(struct rte_devargs *devargs, struct cnxk_eth_dev *dev)
@@ -263,9 +264,10 @@ cnxk_ethdev_parse_devargs(struct rte_devargs *devargs, struct cnxk_eth_dev *dev)
 	struct sdp_channel sdp_chan;
 	uint16_t rss_tag_as_xor = 0;
 	uint16_t scalar_enable = 0;
-	uint8_t lock_rx_ctx = 0;
+	uint16_t custom_sa_act = 0;
 	struct rte_kvargs *kvlist;
 	uint16_t no_inl_dev = 0;
+	uint8_t lock_rx_ctx = 0;
 
 	memset(&sdp_chan, 0, sizeof(sdp_chan));
 	memset(&pre_l2_info, 0, sizeof(struct flow_pre_l2_size_info));
@@ -307,6 +309,8 @@ cnxk_ethdev_parse_devargs(struct rte_devargs *devargs, struct cnxk_eth_dev *dev)
 			   &parse_sdp_channel_mask, &sdp_chan);
 	rte_kvargs_process(kvlist, CNXK_FLOW_PRE_L2_INFO,
 			   &parse_pre_l2_hdr_info, &pre_l2_info);
+	rte_kvargs_process(kvlist, CNXK_CUSTOM_SA_ACT, &parse_flag,
+			   &custom_sa_act);
 	rte_kvargs_free(kvlist);
 
 null_devargs:
@@ -323,6 +327,7 @@ cnxk_ethdev_parse_devargs(struct rte_devargs *devargs, struct cnxk_eth_dev *dev)
 	dev->nix.max_sqb_count = sqb_count;
 	dev->nix.reta_sz = reta_sz;
 	dev->nix.lock_rx_ctx = lock_rx_ctx;
+	dev->nix.custom_sa_action = custom_sa_act;
 	dev->npc.flow_prealloc_size = flow_prealloc_size;
 	dev->npc.flow_max_priority = flow_max_priority;
 	dev->npc.switch_header_type = switch_header_type;
@@ -350,4 +355,5 @@ RTE_PMD_REGISTER_PARAM_STRING(net_cnxk,
 			      CNXK_FLOW_PRE_L2_INFO "=<0-255>/<1-255>/<0-1>"
 			      CNXK_OUTB_NB_CRYPTO_QS "=<1-64>"
 			      CNXK_NO_INL_DEV "=0"
-			      CNXK_SDP_CHANNEL_MASK "=<1-4095>/<1-4095>");
+			      CNXK_SDP_CHANNEL_MASK "=<1-4095>/<1-4095>"
+			      CNXK_CUSTOM_SA_ACT "=1");
-- 
2.25.1